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      1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 cr.define('options', function() {
      6   /** @const */ var SettingsDialog = options.SettingsDialog;
      7 
      8   /**
      9    * PointerOverlay class
     10    * Dialog that allows users to set pointer settings (touchpad/mouse).
     11    * @constructor
     12    * @extends {options.SettingsDialog}
     13    */
     14   function PointerOverlay() {
     15     // The title is updated dynamically in the setTitle method as pointer
     16     // devices are discovered or removed.
     17     SettingsDialog.call(this, 'pointer-overlay',
     18         '', 'pointer-overlay',
     19         assertInstanceof($('pointer-overlay-confirm'), HTMLButtonElement),
     20         assertInstanceof($('pointer-overlay-cancel'), HTMLButtonElement));
     21   }
     22 
     23   cr.addSingletonGetter(PointerOverlay);
     24 
     25   PointerOverlay.prototype = {
     26     __proto__: SettingsDialog.prototype,
     27   };
     28 
     29   /**
     30    * Sets the visibility state of the touchpad group.
     31    * @param {boolean} show True to show, false to hide.
     32    */
     33   PointerOverlay.showTouchpadControls = function(show) {
     34     $('pointer-section-touchpad').hidden = !show;
     35   };
     36 
     37   /**
     38    * Sets the visibility state of the mouse group.
     39    * @param {boolean} show True to show, false to hide.
     40    */
     41   PointerOverlay.showMouseControls = function(show) {
     42     $('pointer-section-mouse').hidden = !show;
     43   };
     44 
     45   /**
     46    * Updates the title of the pointer dialog.  The title is set dynamically
     47    * based on whether a touchpad, mouse or both are present.  The label on the
     48    * button that activates the overlay is also updated to stay in sync. A
     49    * message is displayed in the main settings page if no pointer devices are
     50    * available.
     51    * @param {string} label i18n key for the overlay title.
     52    */
     53   PointerOverlay.setTitle = function(label) {
     54     var button = $('pointer-settings-button');
     55     var noPointersLabel = $('no-pointing-devices');
     56     if (label.length > 0) {
     57       var title = loadTimeData.getString(label);
     58       button.textContent = title;
     59       button.hidden = false;
     60       noPointersLabel.hidden = true;
     61     } else {
     62       button.hidden = true;
     63       noPointersLabel.hidden = false;
     64     }
     65   };
     66 
     67   // Export
     68   return {
     69     PointerOverlay: PointerOverlay
     70   };
     71 });
     72